[GRASS-dev] problem with rendering in wxNviz

[Hamish]

Anna Kratochvílová wrote:
> I have following problem in GRASS wxNviz: after changes in
> viewing position the surface doesn't render in full
> resolution and some part of it is not rendered at all, I had
> to move mouse over the displayed surface. The problem is
> probably connected with another one, when I click on erase
> button, surface renders in full resolution, then the next
> click on erase button erases the display. 
> I tried to change the function gsd_flush so that it calls
> glFinish instead of glFlush and it helped, but I'm not sure
> if it doesn't affect anything else and if this is the best
> solution because I have no experience with openGL.
> 
> I haven't noticed that anyone has the same problem. I have
> Ubuntu 10.04, DELL Inspiron and this behaviour occurs in
> GRASS 6.5 and 7. I don't know if some other information
> could be relevant.

Hi,

just as a debugging test, do you observe the same behaviour
in tcl/tk NVIZ? What you describe sounds somewhat familiar, the
rerendering in the tcltk version has always been a bit jumpy. I
try to sit perfectly still and not touch the mouse at all until
it is 100% done. :)


Hamish